Tunnels narrow the focus of a piece and easily direct the eye.

地道压缩了作品的焦点，便于引导视线。

youdao

Only make their narrow open up, shortsighted eye can put far;

只有使自己狭隘的心胸开阔起来，短视的眼光才能放远；

youdao

Only make their narrow open up, shortsighted eye can put far;

只有使自己狭隘的心胸开阔起来，短视的眼光才能放远；

youdao